Kerri Walsh will be headed to London with her teammate Misty May-Traenor in search of a third gold medal in beach volleyball. Training in sand, which provides little traction, makes a full-body workout even tougher, but for Kerri it's all in a day's work. Here's a beach workout the Olympian created with her trainer Kerry Wachtfogel. Repeat the entire circuit three times and be prepared to sweat!